weekday() = default; | (1) | (since C++20) |

explicit constexpr weekday(unsigned wd) noexcept; | (2) | (since C++20) |

constexpr weekday(const std::chrono::sys_days& dp) noexcept; | (3) | (since C++20) |

explicit constexpr weekday(const std::chrono::local_days& dp) noexcept; | (4) | (since C++20) |

Constructs a `weekday`

object.

1) Default constructor leaves the weekday value uninitialized.

2) Constructs a

`weekday`

object holding the weekday value `wd`

. If `wd > 255`

, the value held is unspecified.
3) Constructs a

`weekday`

object representing the day of the week `dp`

corresponds to. This constructor defines an implicit conversion from `std::chrono::sys_days`

to `weekday`

.
4) Constructs a

`weekday`

object representing the day of the week `dp`

corresponds to, as if by `weekday(std::chrono::sys_days(dp.time_since_epoch()))`

.
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